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IMO 1992 - Shortlisted problems Question 8

IMO Shortlist · IMO 1992 - Shortlisted problems

Question 8

(IND 5) Show that in the plane there exists a convex polygon of $1992$ sides satisfying the following conditions:
(i) its side lengths are $1,2,3,\ldots,1992$ in some order;
(ii) the polygon is circumscribable about a circle.

Alternative formulation. Does there exist a $1992$-gon with side lengths $1,2,3,\ldots,1992$ circumscribed about a circle? Answer the same question for a $1990$-gon.